Scattering of Fast Potassium Ions by Helium, Neon, and Argon
- 1 September 1972
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 57 (5), 2117-2121
- https://doi.org/10.1063/1.1678538
Abstract
A new apparatus has been designed and built, and measurements have been made of the effective total cross sections for the scattering of potassium ions with energies between 150 and 2350 eV by room temperature helium, neon, and argon. The repulsive interaction potentials were deduced from the measured cross sections with two different representations of the potential, the inverse power, and the exponential. The results are as follows (energies are in electron volts and distances are in angstroms): These results compare very favorably with other experimental potentials reported recently but are in sharp disagreement with some earlier results. They also disagree with reported potentials which were calculated theoretically, except for the case of where the agreement between theory and experiment is remarkably good. The potentials are also compared to those determined from measurements of the scattering of argon by the same three gases, and the effect on the potential of the additional nuclear charge is discussed.
Keywords
This publication has 21 references indexed in Scilit:
- Experimental Determination of the Repulsive Potentials between K+ Ions and Rare-Gas AtomsThe Journal of Chemical Physics, 1972
- Elastic scattering of potassium ions in the energy range 150–4000 eV with argonPhysica, 1969
- Scattering of High-Velocity Neutral Particles. XIV. He–He Interaction below 1.1 ÅThe Journal of Chemical Physics, 1967
- Impact Expansions in Classical and Semiclassical ScatteringPhysical Review B, 1966
- Elastic Scattering of High‐Energy Beams: Repulsive ForcesAdvances in Chemical Physics, 1966
- Theoretical and experimental determination of an error in the pressure indication of a McLeod manometerVacuum, 1965
- Avoiding Erroneous Submicron Pressure Readings: A Refrigerated McLeodJournal of Vacuum Science and Technology, 1964
- Influence of diffusion on the measurement of low pressure with the McLeod vacuum gauge. Based on a paper by GaedeVacuum, 1963
- Reduction of Surface Charges in Ion Beam ApparatusReview of Scientific Instruments, 1960
- The scattering of positive ions by neutral atomsPhilosophical Magazine, 1957